Smoke-consuming boiler.



W. C. GURNEY.

SMOKE comsumme BOILER.

APPLICATION FILED JUNE 15. l9l4.

Patented Dec. 14, 1915.

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SMOKE CONSUMING BOILER.

APPLICATION FILED JUNE 15. 1914.

Llfigfififi, Patented Dec. 14, 1915.

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' WILLIAMCROMWELLGURNEY,0FTORONTO, ONTARIO, CANADA, A SS IGNORTO' I GURNEY HEATER MANUFACTURING COMPANY,- OF BOSTON, ;MASSACHU- SETTS, A CORPORATION OF MASSACHUSETTSVQH Z l SMOKE-CONSUIVIING BoitnR.

To all whom it may concern Be it known that I, HLLIAM CRoMwnLL GURNEY, a British subject, andresident of the city of Toronto, in the county of York and Province of Ontario, Dominion of Canada, have invented certain new and useful Improvements in Smoke-Consuming Boilers; and I hereby declare that the following is a full, clear, andexact description of'the same.

My invention relates to the peculiar construction and arrangement of the fire and combustion chambers of a hot water or steam boiler, one of the objects ofmy invention being to provide the firechamber with a hollow water grate, connected with the water or steam spaces of the assembled boiler sections, which will permit ofthe gas from the decomposing fuel passingto the underside of the grate where a consuming fire is maintained in a secondary fire chamber, a suitable opening being provided below the'grate fonthe passage of the con sumed or partly consumed gas from the fire chamber to the combustion chamber; another object of my-invention being to construct the hollow water grate of separated sections whereby they can contract and expand independently ofeach other as a result of the variations of temperature in the fire chamber; and a further object of my invention is to provide the secondary fire chamber with grate bars to receive the droppings from the fire above it, whereby such droppings will not only be completely consumed, but can be utilized for the combustion of the gas passing downwardly from the main fire, as hereinafter set forth and particularly pointed out in the claim.

In the drawings Figure 1, is a sectional perspective view of a hot water or steam boiler showing the construction and arrangement of the essential parts of the invention. Fig. 2 is a broken sectional view showing the hollow fire grate in circulation with the boiler sections.

The boiler may be composed of any desired number of boiler sections a assembled to form water or steam spaces inclosing the fire chamber 6. In the fire chamber 6 is a hollow water grate connected with the water or steam spaces of the boiler sections so that a circulation of water may be maintained through the grate. In the grate are spe fi .s s n PatentedDec.14,1915. Application filea'nme'ls, 1914. Serial No. 845,326. I I

flue openings at through which the gas passes from the burning fuel on the grate and through which the droppings from the fire may pass into the secondary fire chamher 6, where not only their complete combustion occurs but where they are utilized for the combustion of the gas passing downwardthrough the grate, and at the bottom of the secondary fire chamber 6 are grate bars f of the usual construction.

The hollow water grate may be made in two or more sections 0 and 0, the grate sections 0 being connected to and in circulation with the boiler sections a at one side of the fire chamber-b and in line with the grate sections 0 connected to and in circulation withthe boiler sections at the other side of the fire chamber. "When the watergrate consists of two grate sections, each section extends slightly less than half way across thefire chamber Z) so that an unoccupied space 0 will be formed between the grate sections; thepurpose of this construction being to permit of the unimpeded expansion and contraction of the grate sections inde: pendently of each other as a result of the variation of temperature in the fire chamber.

As shown in the drawings, a set of water tubes 9 are-located "in'the top of the fire is a combustion chamber 2' in which are lo cated water tubes j, the water tubes j, 72 and 9 being in circulation with the boiler sections a. Between the fire and combustion chambers is a bridge wall is, and formed through the bridge wall is below the water grate 0 is an opening Z through which the burning gas passes from the fire chamber 6 to the combustion chamber.

In the fire chamber 5 above the water grate are draft openings m and below the grate bars f are draft openings 0. At the back of the combustion chamber 2' is a smoke outlet 79.

In the operation of the furnace, soft coal slack is introduced into the fire chamber 6 through the fire doors 9, and when so introduced the fire within the fire chamber dewardly the solid carbon which may. have, been given off is deposited upon the fire in the secondary fire chamber 6 and is consumed by the burning coals on the grate bars f, so that when the gas passes into the combustion chamber a it will be practically free from solid carbon, and what little carbon is carried into the combustion chamber by the gas will be completely consumed by the flames therein before the gas escapes to the smoke outlet 39.

The operation of the boiler may be briefly summarized by stating; that the fire'is built on the grate which is hollow to form a water section in circulation with the boilersections a, that fresh air is taken in above this fire and the flames and gas plunge downwardly through the fiue openings in this grate; that some of the burning fuel drops through these flue openings on to the grate bars f at the bottom of the secondary fire chamber and forms an incandescent fire thereon; that the gas bursts into flame as it passes over the secondary fire and is mostly consumed before passing into the combustion chamber; that the products of combustion from both fires then enter the combustion chamber in the rear of the fire chambers where 7 their combustion is completed as they pass Copies of this patent may be obtained for in the zigzag course between the series of water tubes to a smoke outlet; that the gas in its passage through the tubes is cooled before it reaches the flue; that. the smoke, when it reaches the smoke outlet, is practically as colorless as that from an anthracite fire and that by constructing the water grate in separated sections provision is made for the expansion of these grate sections toward the center of the boiler casing; and the possibility of the expansion of the grate sections forcing the boiler sides outward is thus avoided.

Having thus fully described the nature of my invention, what I claim as new and desire to secure by Letters Patent, is: I v

A boiler composed of a set of assembled boiler sections forming water or steam spaces inclosing a fire chamber, a hollow grate within the fire chamber consisting of two sets of grate sections, the grate sections of one set being connected to and in circulation withthe boiler sections at one side of the fire chamber and the grate sections of the other set being connected to and in circulation with the boiler sections at the other side of the fire chamber and in line with those of the first set, with an unoccupied space between the grate sections of each set whereby each set of grate sections can expand and contract independently of the other. a

Toronto, May 13th, 1914:.

WILLIAM GROMWELL GURNEY.

WVitnesses CHAS. H. RICI-IES, STANLEY RICHIE-S.

five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

